Are you still looking for a teaching apparatus to let your student know the Lenz's Law? Then, our Lenz's Law experiment equipment set is one of the for you. Using aluminum and plastic material, it is safe and . A perfect physics teaching aid for you. Features - Color: Black. - Material: Aluminum, plastic. - Size: Approx. 14.50X9.50X6.50cm/5.70X3.73X2.55in. - After the aluminum ring is installed stationary, pass the magnet in the same direction from the closed ring several times to see the demonstrator slowly rotating. - The magnet need to be before use, too weak magnetism will affect the effect. - When not in use, protect the needle tip and pay attention to to of the . - Widely applied in home, laboratory, middle school, training institution, research institute, etc. - Let students learn Lenz's law in interesting experiments and improve their physics performance. Package list: 1 x Set of Lenz' Law Apparatus